EO Flanges can provide ANSI B16.5 Class 900 Socket-Weld Flanges, which Length Thru Hub from 1.25 to 2.5 in, Hub Diameter from 1.5 to 4.88 in, Bore will be Specified by Purchaser, etc. A Socket Weld flange is very similar in appearance to a Slip-On flange, but the main difference is the socket...